Muzzle recoil check for firearms



Sept. 11, 1951 E, PRACHE 2,567,826

MUZZLE RECOIL CHECK FOR FIREARMS Filed May 17, 1948 Figl.

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Attorneys Patented Sept. 11 1951 STATES OFFICE --.MUZZLE RECOIL CHECKJ QR-EIREARMS Jacques Emilien Praehe,fFontenay sous Bois, France, assignor to Schneider (lie, Paris,

France, 'a, special partnership of France a plication-Marv, 194's, "se i l'nafzassv 1 Claim.

1 "This invention relates 'to'a muzzle recoil check for firearms, of the type constituted by a pile of removable cup-shaped deflecting members supported by a cylindrical ibody bored substantially to ithe diameter of the b'arrel'a't the base of the the .said muzzle recoil :check comprising openings permitting the gases to escape-in order to impinge against the deflectors which deflect them laterally and rearwardly.

In devices comprising piles of deflectors of this nature, it is known to'c'losethe lowerpartofthe gaps separating the deflecting elements in'o'rd'er to prevent the gases escaping therefrom from scoring the ground below the gun. Muzzle recoil checks are also known which comprise solely lateral discharge orifices.

The device proposed, which combines these various known methods, has been designed with a view to simplifying the construction while ensuring the possibility of readily replacing the defiecting members, which'are exposed to erosion under the effect of the gas jets, and to enable the said device to be adapted with the minimum number of changes to different firin conditions and requirements as to output.

According to the invention, the new muzzle recoil check is constituted by a hollow cylindrical body fitted on the muzzle of the barrel or made in one piece therewith, and provided with two opposite lateral openings of substantially rectangular form which extend over the entire length of the pile of deflecting members which are constituted by oblong plates bored to the external diameter of the aforesaid body. there being formed in each of the said plates two lateral vanes symmetrically disposed to the right and to the left, and the said elements which are fitted over the said body and maintained in the correct position, being locked one against the other and against a shoulder on the body of the device by means of an end nut.

One embodiment of the invention is illustrated, by way of example, in the accompanying drawings, in which:

Figure 1 is a longitudinal view of the device, one half of which is in section and the other half in elevation,

Figure 2 is a plan, one half of which is again a sectional view and the other half an external View, I

Figure 3 is a cross section on the line III-III of Figure 2.

In these figures, I designates the hollow cylindrical body of the muzzle recoil check secured by screwing on the beaded muzzle portion 2 of In France May- 31, I947 transverse direction) 'and'natur'ally has a bore "corresponding to the external diameter of the said body. The said plates are positioned and prevented from turning by a longitudinal key 5 secured in a groove lb in the body I, while the plates themselves have a similar groove 4a. The various plates in the pile which have parallel faces are locked one against the other and against a shoulder lc on the body I by a nut 6 screwed on the free extremity of the said body with the interposition of an adjusted member 1.

The deflecting plates 4 have laterally hollowed therein concave surfaces 8 and convex surfaces 9 of suitable profile, so as to form guide vanes l0 and the shoulder lc of the body I is similarly shaped at H, so that the assemblage of plates, when mounted on the cylinder, forms on either side thereof three divergent nozzles through which there now the gases which have passed through the openings 3, whereby the desired reducing effect is produced on the recoil of the firearm.

As will be seen, the pile of plates can be instantly dismounted by simply unscrewing the nut 6.

Of course, the profile of the blades can vary within very wide limits from one vane to the other, and since it is easy to replace one or more of the plates in the same device by plates having vanes of diiferent profile from the vanes of the first plates, this method of construction renders the muzzle recoil check widely adaptable to the firing conditions and to the required output, which is not necessarily the maximum output.

It will be seen that in the embodiment illustrated the angle of deflection from the first nozzle ll-8 is greater than that from the following two nozzles 9-8. However, it may be advantageous toadopt the opposite arrangement in order to prevent deflection of the sheet of gases on to the gun crew, the gas sheets issuing from the downstream nozzles being broken against the what manner the same is to be performed, I

declare that what I claim is:

A muzzle recoil check for firearms comprising a hollow cylindrical body adapted to be fitted on the muzzle of a firearm and having two laterally opposed and longitudinally elongated openings,

for the escape of gases;"and means for controlling and deflecting the escaping gases comprising a pile of aligned deflector plates mounted on said body for longitudinal sliding movement, said plates having flat parallel surfaces for engagement with one another to form a solid pile, means 7 for locking said plates in engagement comprising a shoulder on said body at one end of the pile and anut on said body at the other end of the pile, said plates having projections extending outwardly from both sides of said body, and

curved recesses cut into the opposite flat surfaces of each projection between its upper and lower margins to form substantially horizontal rearwardly curved vanes extending from said openings to the outer edges of said projections, said projections and vanes forming between them two rows of outwardly extending rearwardly curved nozzles one on each side of said body for de fleeting the gases escaping-through said openings, the vanes of individual plates having different curved profiles and said plates being interchangeable in the pile for adjustment of the curvature of the nozzles and of the recoil checking effect.

JACQUES EMILIEN PRACHE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITE'Q STATES PATENTS Number Name Date 1,948,496 Barnes Feb. 2'7, 1934 2,088,380 Methlin July 27, 1937 FOREIGN PATENTS Number Country Date 125,141 Great Britain Apr. 17, 1919 715,769 France Sept. 29, 1931 454,533 Great Britain Oct. 2, 1936 828,320 France May 16, 1938 OTHER REFERENCES Pages 32-36, May-June 1945 issue of The Coast Artillery Journal. 

